Physical Optics Corporation (POC) developed the body-worn Integrated Soldier Power and Data System (ISPDS), a configurable node for plug-in wired or wireless server/client or peer-to-peer computing with accommodations for power, sensor I/O interfaces, and energy harvesting. The enabling technology increases the efficacy of uniformed personnel and first responders and provides an option for reducing force structure associated with the need for hardware network infrastructure to enable a mobile digital communications architecture for dismounted troops. The ISPDS system addresses the DoD’s need for an “intelligent” power control system in an effort to increase mission duration and maximize the first responders and warfighter’s effectiveness without concern for the available energy resources (i.e., batteries). ISPDS maximizes durability and survivability, assesses influences that affect performance, and provides the network backbone and mobile node hardware. POC is producing two vest-integrated variants, one each for the U.S. Army PEO Ground Soldier and the Air Soldier, with each including state-of-the-art low-profile and robust wearable connectors, cabling, and harnesses, and an integrated low-profile power manager and conformal battery for data and power distribution. The innovative intelligent power controller (IPC), in the form of the ISPDS firmware and power sensing and control electronics, will enable ISPDS to optimize power levels both automatically and in accordance with manually set preferences. The IPC module is power dense and efficient, and adaptively provides lossless transfer of available harvested photovoltaic energy to the battery. The integrated systems were tested for suitable electrical, electromagnetic interference (EMI), and environmental performance as outlined in military standards such as MIL-STD- 810G and MIL STD-461F.
Radiation detector capable of discriminating between different species of high energy ions is of great demand by aerospace and high energy physics communities. We propose the optical fiber-based real time ion detector and discriminator, which can have long lifetime in radiation environment, can be compact and low production cost. The basis of detector's principle of operation is the strong dependence of the pattern of energy dissipation with ion penetration depth in the matter on the type of the ion. Another key phenomenon enabling our fiber optic based detector is the refractive index change in optical fiber in the vicinity of particle track due to the dissipated energy. These two effects provide the opportunity to measure the energy dissipation versus penetration depth as well as total energy released simultaneously in real time with a single detector. Thus, different types of ions can be distinguished by measuring total energy dissipated and energy dissipation versus distance. To discriminate between ions species we propose to use measurement of the Bragg peak position. Total energy dissipated by the particle in the detector material and determination of the Bragg peak position gives the full information on the kind of the incident ion as confirmed via simulations.
Erbium-doped Y<sub>2</sub>O<sub>3</sub> thin films were synthesized by combining radical-enhanced atomic layer deposition (RE-ALD) of Y<sub>2</sub>O<sub>3</sub> and Er<sub>2</sub>O<sub>3</sub> in an alternating fashion at 350°C. The Er doping level was precisely controlled to range from 6 to 14 at.% by varying the ratio of Y<sub>2</sub>O<sub>3</sub>:Er<sub>2</sub>O<sub>3</sub> cycles during deposition. At 350°C, the films were found to be polycrystalline, showing a preferential growth direction in the  direction. Room-temperature photoluminescence (PL) at 1.54 μm, characteristic of the Er<sup>3+</sup> intra 4<i>f</i> transition, was observed in a 500-Å Er-doped (6 at.%) Y<sub>2</sub>O<sub>3</sub> film, showing well resolved Stark features indicating the proper incorporation of Er in the Y<sub>2</sub>O<sub>3</sub> host. Extended X-ray absorption fine structure (EXAFS) analysis revealed a six-fold coordination of Er by O in all samples, suggesting that the PL quenching observed at high Er concentration (>8 at.%) is likely dominated by Er ion-ion interaction and not by Er immiscibility in the Y<sub>2</sub>O<sub>3</sub> host. The effective absorption cross section for Er<sup>3+</sup> ions incorporated in Y<sub>2</sub>O<sub>3</sub> was determined to be ~10<sup>-18</sup> cm<sup>2</sup>, about three orders of magnitude larger than the direct optical absorption cross section reported for Er<sup>3+</sup> ions in a stoichiometric SiO<sub>2</sub> host.
We propose an implementation of the spin waves for massively parallel quantum network. A spin wave based quantum network offers an advantage of random access to any qubit in the network and, consequently, the ability to recognize two qubit gates and performance gate operation between any two distant qubits. Using model simulations we illustrate the process of the two distant qubit entanglement via spin waves exchange. The utilization of spin waves allows us to avoid the most difficult single electron spin measurements procedure. Instead, qubit state recognition is accomplished by measurement of spin wave excited in a ferromagnetic layer. By estimate the proposed scheme has as high as 10<sup>4</sup> ratio between quantum system coherence time and the time of a single computational step.